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bug#18013: 24.3.92; looking-back "[^\n]" taking a lot of time in large b
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bug#18013: 24.3.92; looking-back "[^\n]" taking a lot of time in large buffers |
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Sat, 25 Mar 2017 16:59:51 -0400 |
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Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux) |
tags 18013 wontfix
close 18013
quit
Nicolas Richard <theonewiththeevillook@yahoo.fr> writes:
>
> (looking-back "[^\n]") is bad code, so I totally deserve this. Still, is
> it possible to make the search smarter when the match is supposed to be
> "anchored" at point ? Otherwise let's just close this bug.
`looking-back' would have to analyse "[^\n]" to realize that it could
only match a single character. I think this is too much effort for too
little benefit to justify implementing this. For cases like this you
can limit the amount of searching by passing a non-nil LIMIT argument
(as described in the docstring):
(looking-back "[^\n]" (1- (point)))
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